Cu-Au TYPE STRUCTURES IN THE STAGGERED QUADRUPOLAR REGION OF THE fcc BLUME-EMERY-GRIFFITHS MODEL


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ÖZKAN A. , Kutlu B.

INTERNATIONAL JOURNAL OF MODERN PHYSICS C, vol.20, no.10, pp.1617-1632, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 20 Issue: 10
  • Publication Date: 2009
  • Doi Number: 10.1142/s0129183109014631
  • Title of Journal : INTERNATIONAL JOURNAL OF MODERN PHYSICS C
  • Page Numbers: pp.1617-1632

Abstract

The spin-1 Ising Blume-Emery-Griffiths (BEG) model has been simulated using a cellular automaton (CA) algorithm improved from the Creutz cellular automaton (CCA) for a face-centered-cubic (fcc) lattice. The ground state diagram (k, d) of the fcc BEG model has ferromagnetic (F), quadrupolar (Q), and staggered quadrupolar (SQ) structure regions. The simulations have been made in the SQ region for the parameter values in the intervals -24 <= d = D/J < 0 and -3 <= k = K/J <= 0. The phase diagrams on the (kT(C)/J, d) and the (kT(C)/J, k) planes have been obtained through k = -3 and d = -4 lines, respectively. The SQ region separates into five regions (A(3)B(a), A(3)B(f), AB (type-I), AB (type-II), and AB(3)(f)) which have the different stoichiometric Cu-Au type structures.